51294739 has 8 divisors (see below), whose sum is σ = 53120000. Its totient is φ = 49480200.

The previous prime is 51294709. The next prime is 51294751. The reversal of 51294739 is 93749215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51294739 - 2²¹ = 49197587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51294709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7762 + ... + 12760.

It is an arithmetic number, because the mean of its divisors is an integer number (6640000).

Almost surely, 2^51294739 is an apocalyptic number.

51294739 is a deficient number, since it is larger than the sum of its proper divisors (1825261).

51294739 is a wasteful number, since it uses less digits than its factorization.

51294739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5361.

The product of its digits is 68040, while the sum is 40.

The square root of 51294739 is about 7162.0345573028. The cubic root of 51294739 is about 371.5559965515. Note that the first 3 decimals are identical.

The spelling of 51294739 in words is "fifty-one million, two hundred ninety-four thousand, seven hundred thirty-nine".